Toothbrush



FIG. 1 is a top plan view of a toothbrush showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is an enlarged front end elevational view thereof; and

FIG. 5 is a rear end elevational end view thereof.

The side not shown comprises a mirror image of the side shown. 

The ornamental design for a toothbrush, as shown and described. 